[IPSEC]: Add ipv6 support to ipsec netlink sockets.

net/ipv4/xfrm_user.c

@@ -63,10 +63,14 @@ static int verify_newsa_info(struct xfrm_usersa_info *p,
 	case AF_INET:
 		break;
 
-	case AF_INET6: /* XXX */
+	case AF_INET6:
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+		break;
+#else
 		err = -EAFNOSUPPORT;
+		goto out;
+#endif
 
-		/* fallthru */
 	default:
 		goto out;
 	};
@@ -171,7 +175,19 @@ static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p,
 		goto error;
 
 	err = -ENOENT;
+	switch (x->props.family) {
+	case AF_INET:
 		x->type = xfrm_get_type(x->id.proto);
+		break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	case AF_INET6:
+		x->type = xfrm6_get_type(x->id.proto);
+		break;
+#endif
+	default:
+		x->type = NULL;
+		break;
+	}
 	if (x->type == NULL)
 		goto error;
 
@@ -206,8 +222,21 @@ static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma)
 	if (!x)
 		return err;
 
+	switch (x->props.family) {
+	case AF_INET:
 		x1 = xfrm_state_lookup(x->props.saddr.xfrm4_addr,
 				       x->id.spi, x->id.proto);
+		break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	case AF_INET6:
+		x1 = xfrm6_state_lookup((struct in6_addr*)x->props.saddr.a6,
+					x->id.spi, x->id.proto);
+		break;
+#endif
+	default:
+		x1 = NULL;
+		break;
+	}
 	if (x1) {
 		xfrm_state_put(x);
 		xfrm_state_put(x1);
@@ -224,7 +253,19 @@ static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma)
 	struct xfrm_state *x;
 	struct xfrm_usersa_id *p = NLMSG_DATA(nlh);
 
+	switch (p->family) {
+	case AF_INET:
 		x = xfrm_state_lookup(p->saddr.xfrm4_addr, p->spi, p->proto);
+		break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	case AF_INET6:
+		x = xfrm6_state_lookup((struct in6_addr*)p->saddr.a6, p->spi, p->proto);
+		break;
+#endif
+	default:
+		x = NULL;
+		break;
+	}
 	if (x == NULL)
 		return -ESRCH;
 
@@ -342,7 +383,19 @@ static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma)
 	struct sk_buff *resp_skb;
 	int err;
 
+	switch (p->family) {
+	case AF_INET:
 		x = xfrm_state_lookup(p->saddr.xfrm4_addr, p->spi, p->proto);
+		break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	case AF_INET6:
+		x = xfrm6_state_lookup((struct in6_addr*)p->saddr.a6, p->spi, p->proto);
+		break;
+#endif
+	default:
+		x = NULL;
+		break;
+	}
 	err = -ESRCH;
 	if (x == NULL)
 		goto out_noput;
@@ -393,9 +446,23 @@ static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, void **
 	err = verify_userspi_info(p);
 	if (err)
 		goto out_noput;
+	switch (p->info.family) {
+	case AF_INET:
 		x = xfrm_find_acq(p->info.mode, p->info.reqid, p->info.id.proto,
 				  p->info.sel.daddr.xfrm4_addr,
 				  p->info.sel.saddr.xfrm4_addr, 1);
+		break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	case AF_INET6:
+		x = xfrm6_find_acq(p->info.mode, p->info.reqid, p->info.id.proto,
+				   (struct in6_addr*)p->info.sel.daddr.a6,
+				   (struct in6_addr*)p->info.sel.saddr.a6, 1);
+		break;
+#endif
+	default:
+		x = NULL;
+		break;
+	}
 	err = -ENOENT;
 	if (x == NULL)
 		goto out_noput;